Christoffel van IJsselstein explained

Christoffel van IJsselstein (died after 1510) was the illegitimate son of Frederik of Egmont, Count of Buren and Leerdam, Lord of IJsselstein (died 1521), and an unknown mother.

He was appointed as bailiff of Sint-Maartensdijk and Scherpenisse by his father and is cited as such in 1500 and 1505.^[1]

He and his descendants bore the Egmond arms quartered with those of IJsselstein.^[2]

By his marriage to Elisabeth van Renesse,^[3] he had the following children:

• Willem van IJsselstein (died in or before 1588), Sheriff (Dutch: drost) of Genemuiden;^[4] he married firstly Margriet Joostdr van Wijngaarden, and secondly Elisabeth Becker, with both of whom he left progeny.^[5] A son by his first wife, Christoffel van IJsselstein (died 1593), was a Lieutenant-General (1579) in the forces of the United Provinces during the Dutch Revolt and acted as Governor of Geertruidenberg (1573–75) and Heusden (1588).
• Fransken van IJsselstein, married Coenraat van Diepholt (died 1572), Marshal of the Nether-Bishopric of Utrecht and Montfoort, Castellan of Abcoude.^[6]

Notes and References

1. Dek, Dr. W.A.E., Genealogie der Heren en Graven van Egmond. The Hague, 1958; pp. 65 and 70.
2. Rootenberg, Francesco Uys, Het geslacht Van Diepholt in het Sticht en Westfalen en hun verwantschap aan de graven van Buren, Kaapstad 2015, pp. 49-50.
3. Rootenberg, Francesco Uys, Het geslacht Van Diepholt in het Sticht en Westfalen en hun verwantschap aan de graven van Buren, Kaapstad 2015, pp. 52-53.
4. Dek, Dr. W.A.E., Genealogie der Heren en Graven van Egmond. The Hague, 1958; p. 70.
5. Rootenberg, Francesco Uys, Het geslacht Van Diepholt in het Sticht en Westfalen en hun verwantschap aan de graven van Buren, Kaapstad 2015, pp. 47-48.
6. Rootenberg, Francesco Uys, Het geslacht Van Diepholt in het Sticht en Westfalen en hun verwantschap aan de graven van Buren, Kaapstad 2015, pp. 45-51.